read particular column form text file in C++

[miladshayan]

I am a beginner
I am using with CORSIKA software. cosika's outputs are text files with 8 or 7 column and more than 2000 row(like matrix) . arrays of this matrix are number in Scientific notation. please see fallowing links:

image of my text file view : http://gobook.ir/0file/output1.txt
this is one of my text file: http://gobook.ir/0file/output1.JPG

I want to read data in 7th column and calculate some parameters like average, maximum, minimum and ...

please help me. thanks